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author | imp <imp@FreeBSD.org> | 2005-12-05 23:30:28 +0000 |
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committer | imp <imp@FreeBSD.org> | 2005-12-05 23:30:28 +0000 |
commit | bf26ea247407f098c35c06dd1766ae53eaa35043 (patch) | |
tree | d9701b90b438433105b2c040bb7fde4433194395 /include/rpcsvc | |
parent | 0fcccb0032586c0136de2c3376457c321dbfb1ed (diff) | |
download | FreeBSD-src-bf26ea247407f098c35c06dd1766ae53eaa35043.zip FreeBSD-src-bf26ea247407f098c35c06dd1766ae53eaa35043.tar.gz |
The Oxford 16C950 based CardBus Serial device that I was given some
time ago appears to be based not on the typical 1.8432MHz clock, or
the other more typical multiple of 8 of this (14.7456MHz), but instead
it appears to be 1/2 the PCI clock rate or 16.50000MHz. I'm not 100%
sure that this is right, but since I did the original entry, I'm going
to go ahead and modify it. With the 14.7456MHz value, I was getting
bits that were ~7.3us instead of ~8.6us like they are supposed to be.
My measuring gear for today is a stupid handheld scope with two
signficant digits. So I don't know if it is 33.000000/2 MHz or some
other value close to 16.5MHz, but 16.5MHz works well enough for me to
use a couple of different devices at 115200 baud, and is a nice even
multiple of a well known clock frequency...
Diffstat (limited to 'include/rpcsvc')
0 files changed, 0 insertions, 0 deletions